Defensive publication



g I rst DEFENSIVE PULICATION T 5 UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 8, 1969 617,846 AZIRIDINIUM SALTS 0F 2-NITRO-L3- INDANDIONES Stephen J. Kuhn, 515 London Road, Sarnia, Ontario, Canada Filed Feb. 23, 1967. Published Apr. 8, 1969 Class 260239 No Drawing. 8 Pages Specification Stable aziridinium (e.g. aziridinium or Z-methylaziridinium) salts of 2-nitro-1,3-indandiones (cg. 2-nitro-1,3- indandione) are prepared by contacting an aziridine with a 2-nitr0-1,3-indandione at a temperature between 10 and 30 C. The compounds have a demonstrated utility as insecticides against the beam aphid. 

